Saw-set



(Model.)

B. LARSON.

$AW SET.

Patented Nov. 15,1881.

INVENTOR ATTORNEYS.

UNITED STATES PATENT @FFICE.

EMANUEL LARSON, OF SOUTH PUEBLO, COLORADO.

SAW-S ET.

SPECIFICATION forming part of Letters Patent No. 249,639, dated November 15, 1881.

Application filed May 25, 1881.

To all whom it may concern:

Be it known that 1, EMANUEL LARSON, of South Pueblo, in the county of Pueblo and State of Colorado, have invented a new and useful Improvement in Saw-Sets, of which the following is a full, clear, and exact description.

My invention relates to a mode of setting saw-teeth by means of rotating wheels provided with projections for engagement with the teeth of the saw.

The invention consists in a novel construction,arrangement, and combination of wheels, gearing, and clamping and adjusting devices, as hereinafter more particularly described and set forth.

In the accompanying drawings, Figure 1 is a top View of a machine embodying my improvements. Fig. 2 is a longitudinal vertical section, and Fig. 3 a transverse vertical section. Fig.4 is a detailed view of one of the trunnions supporting the jaws H.

Similar letters of reference indicate corresponding parts.

The working parts of the machine are supported by a base or platform, consisting of a plate, A, which is screwed or otherwise secured to a table or bench.

In the center of the plate A is a vertical pivot, B, having a knob or enlargement, b, .at its upper end, under which is a rubber ring or washer, O. The lower end of the pivot is screwthreaded, and is provided with a nut, (I, through which and the bottom of the plate A thepivot B passes, said pivot also passing through one end of a bar, E, which is provided with a slot, 6, near its outer end.

At two corners of the plate A are inserted two screws, G G, in the tops of which are recesses, forming bearings for trunnions or pivots h at the ends of the lowerjaw, H, of the saw clamp. The upper jaw, H corresponds in shape with the lower one, with the exception of the trunnions, and each jaw has a lip or lug extending from its rear edge. The lip of the lower jaw is pivoted to the inner end of a bar, J, and the lip of the upper jaw to a similar bar, J The outer ends of these bars are connected together and provided with a nut, i, in

(Modem screw K works in the slot 6 in the bar J, and is provided with washers k 70 above and below said bar. In the two bars or double bar J J is a slot extending from the nutt to the point ot'junction of the bars with the clamping-jaws. In this slot works a spiral spring, L, one end of which bears against the nut 43, and the other end is provided with a follower, Z. In each clamping-jaw is a slot, in which works a shorter spring, M, provided with a follower, m.

On the top of the plate A rests a bevel-gear wheel, P, through which the pivot B passes,

with the washer 0 between said wheel and the knob 12. This wheel I? carries a ring, P having teeth 12 extending radially from its periphery.

In the knob or enlargement b is journaled a crank-shaft, q, the inner end of which carries a bevel-gear wheel, Q, engaging with the gearwheel P. On the periphery of the wheel Q are studs or projections R. a

The saw S is clamped between the jaws H 1 with its teeth in line with the studs or projections It, and bearing against two rubber rollers, T, carried by adjustable arms t on the top of the plate A. On turning the shaft q the saw is set by the action of the studs or projections R, which press the saw teeth down between the teeth 12 of the ring I, which teeth 1; engage with the saw-teeth and move the saw longitudinally between the clamping-jaws as the setting process continues.

To the upper jaw, B are attached two bars, V, which project over the base or plate A, and are provided with slot-s, through which screws 1; pass into said plate. By means of these bars and screws and the screw K the pitch of the set may be regulated... By turning the screw K in one direction the double bar J J is ele vated, and by turning it in the opposite direction said double bar is lowered, and the inclination of the saw-clamp corresponds with that of the double bar. By tightening or loosening the screws 1; to correspond with the adjustment of the screw K the clamp is held steadily in position.

When the saw is in place in the clamp it is held against the rubber rollers T by the pressure of the spring against it. When the sawblade is narrow the spring M and follower m are used, and when the blade is wide the small spring is removed and the pressure is applied by the spring L.

When the bars E and J J are moved to the right or left the screw K slides in the slot 6. By this motion the pressure of the spring on the back of the saw-blade is lessened.

By means of the rubber washer O and the nut 61 the wheel Q may be adjusted nearer to or farther from the wheel I in order to correspond with different thicknesses of saws.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of the plate A, pivot B, and beveled-gear wheels Q and P, provided with the projections R and P and actuated by the crank-shaft q, whereby the saw is moved and set, substantially as shown and described.

2. The combination, with the base A, pivot B, and wheels P Q, of the rubber washer G and nut d, substantially as and for the purpose herein described.

3. The combination, with the base A and pivot B, of the bar E, screw K, double bar J J and clamp H H substantially as herein described.

4. The combination, with the double bar J J and clamp H H of the springs L and M and their followers lm, substantially as and for the purpose herein described.

5. The combination, with the plate A, of the saw-clamp consisting of the two jaws H H, the lower of which is provided with trunnions h at its ends, and the screws G, whereby the saw is adjustably held while being moved and set.

6. The combination, with the double bar J J and saw-clamp H H, of the screw K, and the slotted bars V, and screws 1;, substantially as and for the purpose herein described.

EMANUEL LARSON.

\Vitnesses:

N. P. RICHARDS, H. A. HAYNES. 

